//两种调试信息输出：alert函数和console控制台（客户端浏览器）输出



//定义数值类型
var age = 23;
alert(age);

//字符类型变量
var question = "中国人\'中国地";
alert (question);

//布尔类型变量
var is_admin = true;
console.log(is_admin);

//数组类型变量
var animals = Array();
animals[0] = "狗";
animals[1] = "猫";
animals[2] = "鸡";
console.log(animals);

//关联数组
var product = Array();
product["name"] = "笔记本电脑";
product["price"] = 4500.0;
console.log(product["price"]);

//对象
var student = new Object();
student.name = "张三";
student.age = 19;
console.log(student);

//选择
var number = 5;
if(number >= 5 && number <= 10){
    console.log("输出数据符合要求！");
}

//while循环
var count = 1;
while(count <= 6){
    console.log(count);
    count++;
}

//for循环
for(var i = 0; i < 6; i++){
    console.log(i);
}

//函数
function square(num) {
    return num * num;
}
console.log(square(20));

//匿名函数
var x = function (a,b) {
    return a + b;
}
console.log(x(3,2));

//匿名函数自执行
console.log("匿名函数自执行："+(function (a, b) {return a*b})(3,4));
console.log("匿名函数自执行："+(function (a, b) {return a-b}(10,2)));

//对象方法
var person = {
  name:"李四",
  age: 20
};
//增加方法
person.show = function () {
    console.log("姓名："+ name + "，年龄" + age);
}
person.show();
//访问对象采用for..in结构
for (var attr in person){
    console.log(typeof person[attr]);
}

//常见对象使用  jQuery
var person2 = {
    name:"王五",
    age:21,
    success: function () {
        console.log("成功")
    }
}
person2.success();


























